import Vue from 'vue'
import VueRouter from 'vue-router'
import Login from '../components/Login.vue'
import Home from '../components/Home.vue'
import Welcome from '../components/Welcome.vue'
import Users from '../components/user/Users.vue'
import Rights from '../components/power/Rights.vue'
import Roles from '../components/power/Roles.vue'


Vue.use(VueRouter)

const routes = [{
        path: '/',
        redirect: '/login'
    },
    {
        path: '/login',
        component: Login
    },
    {
        path: '/home',
        component: Home,
        redirect: '/welcome',
        // 子路由
        children: [{
            path: '/welcome',
            component: Welcome
        }, {
            path: '/users',
            component: Users
        }, {
            path: '/rights',
            component: Rights
        }, {
            path: '/roles',
            component: Roles
        }, ]
    }
]

const router = new VueRouter({
    routes
})

// 路由导航守卫
router.beforeEach((to, from, next) => {
    // to指的是将要访问的路径
    // from指的是从哪个路径跳转而来
    // next()直接放行
    // next('路径')强制跳转
    if (to.path === '/login') {
        return next()
    } else {
        const tokenStr = window.sessionStorage.getItem('token')
        if (!tokenStr) {
            return next('/login')
        } else {
            next()
        }
    }
})


export default router